Exogenous Glycine Betaine Ameliorates the Adverse Effect of Salt Stress on Perennial Ryegrass
By Longxing Hu, T. Hu, Xunzhong Zhang, H. Pang, Jinmin Fu. 2012
136 citations recorded by the source corpus.
ADDITIONAL INDEX WORDS. antioxidant enzymes, glycine betaine, ion homeostasis, perennial ryegrass, salt stress ABSTRACT. Salinity stress may involve the accumulation of glycine betaine (GB). The objective of this study was to examine whether exogenous GB would ameliorate the detrimental effect of salinity stress on perennial ryegrass (Loliumperenne).Thegrass wassubjected totwo salinitylevels(0 and250mMNaCl)and threeGB levels(0,20, and50 mM). Salinity resulted in a remarkable decrease in vertical shoot growth rate (VSGR), shoot and root fresh weight, relative water content (RWC), relative transpiration rate (Tr), and chlorophyll (Chl) content, superoxide dismutase (SOD),catalase(CAT),andascorbateperoxidase(APX)activities.Plantssubjectedtosaltexhibitedanincreaseinleaf electrolyte leakage (EL), lipid peroxidation (MDA), and proline content. Application of GB reduced EL, MDA, and prolinecontent in salt-stressed plants.Perennial ryegrasssubjected to salt stress plusGB had a greater level of VSGR, RWC, relative Tr, Chl content, and activities of SOD, CAT, and APX when compared with salt-stressed without GB. Salt stress increased Na + and decreased K + content, which resulted in a higher Na + /K + ratio in perennial ryegrass. Application of 20 mM GB suppressed Na + accumulation, whereas the K + content was significantly increased in shoot, which led to a higher K + /Na + ratio under saline conditions. These results suggested that GB-enhanced salt tolerance in perennial ryegrass was mainly related to the elevated SOD, CAT, and APX activity and alleviation of cell membrane damage by reducing oxidation of membrane lipid and improving the ion homeostasis under salt stress.
Subfields: Ecology, Evolution, Behavior and Systematics, Plant Science
View Paper: https://www.semanticscholar.org/paper/6c6d251755d79dd811e6cad77d82921fca7ffa51
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In Ecology, Evolution, Behavior and Systematics
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Citations in the corpus
- Roles of glycine betaine in mitigating deleterious effect of salt stress on lettuce (Lactuca sativa L.) (2015, result): “These findings are consistent with those of Gadallah (1999) and Hu et al. (2012) who confirmed that GB-enhanced salt tolerance in lettuce could be mainly related to the elevated SOD, CAT and APX activity and alleviation of cell membrane damage by reducing oxidation of membrane lipid and improving…”
- Simultaneous application of salicylic acid and calcium improves salt tolerance in two contrasting tomato (Solanum lycopersicum) cultivars (2014, background): “Exogenous use of various chemicals to alleviate the toxic effects of saline stress may have implications both from theoretical and practical perspectives (Wahid et al., 2007; Wasti et al., 2012; Hu et al., 2012; Idrees et al., 2012; Tanou et al., 2012).”
- Glycine-betaine induced salinity tolerance in maize by regulating the physiological attributes, antioxidant defense system and ionic homeostasis (2021, background): “Therefore, this can indirectly mediate the water retentions in plant tissues (Hu et al., 2012).”
- Research Advances in Mechanisms of Turfgrass Tolerance to Abiotic Stresses: From Physiology to Molecular Biology (2014, methodology): “…treated with GB had lower electrolyte leakage and lipid peroxidation, Na+ accumulation, and greater leaf relative water content, chlorophyll content, activities of SOD, CAT, and APX, and K+ concentration, compared to the plants without GB pre-treatment under salinity stress (Hu et al., 2012c).”